My 50L2300U Toshiba, approximately 18 months old, has a large (6 to 8 inches wide) dark band going horizontally
across the screen (and in two lighter spots on the top), which makes it look like a dark shadow, as seen above.
This has been happening for about a month now. It started sporadically, and used to be remedied by a quick OFF/ON of the TV. But of course, it's now gotten worse. More recently, it has also begin to flicker in one of the spots up top.
Here is a short video clip which shows the flickering
View clip here
It seems to me that it's related to some of the LEDs not coming on. (Based on two reviews I read of the TV, it's a direct-lit unit.) The screen quality is otherwise fine. The "shadowing" appears regardless of source (including over-air antenna) and dims menus as well... also pointing me to backlight.
DISCLAIMER: My background is in IT/Systems Administration, so I'm decent at general troubleshooting but I am not a TV repairman/electronics expert. I know enough to be dangerous. So please, if you have any technical suggestions, use clear and concise language as if you were talking to a student.
- Power cycle (used to fix issue temporarily)
- Connected to extension cord and plugged in to different outlets around the house (trying to eliminate ground loop issues, etc.)
- Disconnecting EVERYTHING except power from the TV, unplugging surrounding electronics from wall
- Leaving off "overnight"
- Reset TV settings, play with backlight level/contrast/etc.
- Removed rear cover and looked for swollen capacitors, or anything else that stood out to my untrained eye
After these initial attempts and a little research, I decided to try replacing the LED driver board (T-CON) after finding the part online. I replaced it today, to no effect. The issue remains.
To be fair, my TV runs almost 24/7. We have a habit of leaving it on "for the dogs" (the more ambient noise, the less they bark at).
Manufacturer's warranty is expired and I do not have the service plan from HHGregg, where I purchased it.
Any thoughts on anything I could look at next? Or am I just screwed? It's already taken apart... I have a multimeter, screwdrivers, and nothing to lose.
LED Driver Board/T-CON: